Rotor, motor and vehicle

Abstract

The utility model relates to a rotor, a motor and a vehicle. The rotor comprises a rotating shaft, an iron core and two balance plates. The rotating shaft is provided with a first oil way, and the iron core sleeves the rotating shaft and is provided with a plurality of second oil ways; the two balance plates are arranged on the rotating shaft in a sleeving mode and located at the two ends of the iron core in the axial direction respectively, and each balance plate is provided with an oil inlet groove and an oil outlet groove. The oil inlet groove of one balance plate is communicated with the first oil way and is communicated with the oil outlet groove of the other balance plate through the corresponding second oil way, and the oil inlet groove of the other balance plate is communicated with the first oil way and is communicated with the oil outlet groove of one balance plate through the corresponding second oil way. Therefore, the first oil way of the rotating shaft can be communicated with the second oil way of the iron core through the oil inlet groove of the balance plate, so that oil passes through the balance plate from the first oil way and then flows through the second oil way to cool the iron core; furthermore, the balance plates are arranged at the two ends of the iron core, opposite oil ways can be formed in the iron core through the second oil ways communicating with the two balance plates, namely, the two-way oil ways are formed in the iron core, and the heat dissipation efficiency of the iron core can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle manufacturing, and in particular to a rotor, a motor and a vehicle. Background Art

[0002] New energy vehicles are gaining more and more attention and favor due to their advantages of energy saving, emission reduction, environmental protection, etc. Among them, the drive motor is a key component in the power system. Due to its high power and serious heat generation, it will continue to heat up during operation, thus affecting its performance. Therefore, how to improve its heat dissipation efficiency has become a problem that technicians in this field must face.

[0003] At present, water cooling is generally used to cool the motor, or oil is used to cool the motor through a hollow shaft. However, in the water cooling method, since the heat needs to pass through the insulation layer and the motor stator to be transferred to the casing and taken away by water, the transfer path is long and the heat dissipation efficiency is low. Although the existing oil cooling method can improve the heat dissipation efficiency of the motor compared to the water cooling method, the cooling effect on the motor rotor is still not sufficient. Utility Model Content

[0004] The present application provides a rotor, a motor and a vehicle to solve the technical problem that the design of the existing rotor oil passage cannot fully cool the rotor.

[0005] According to one aspect of the present application, a rotor is provided, comprising a rotating shaft, an iron core and two balancing plates; the rotating shaft is provided with a first oil circuit, the iron core is sleeved on the rotating shaft and provided with a plurality of second oil circuits; the two balancing plates are sleeved on the rotating shaft and are respectively located at both ends of the iron core in the axial direction, and each of the balancing plates is provided with an oil inlet groove and an oil outlet groove; the oil inlet groove of one of the balancing plates is connected to the first oil circuit and is connected to the oil outlet groove of the other balancing plate through the corresponding second oil circuit, and the oil inlet groove of the other balancing plate is connected to the first oil circuit and is connected to the oil outlet groove of one of the balancing plates through the corresponding second oil circuit.

[0006] Optionally, the first oil circuit has a first oil outlet and a second oil outlet extending radially, and the first oil circuit is connected to the oil inlet groove of one of the balance plates through the first oil outlet, and is connected to the oil inlet groove of the other balance plate through the second oil outlet; the first oil outlet and the second oil outlet are spaced apart in the axial direction and the circumferential direction.

[0007] Optionally, the number of the first oil outlets and the number of the second oil outlets are both multiple; the multiple first oil outlets are spaced apart in the circumferential direction, the multiple second oil outlets are spaced apart in the circumferential direction, and each of the second oil outlets is located between two of the first oil outlets in the circumferential direction.

[0008] Optionally, the number of the first oil outlets and the number of the second oil outlets are both two; the two first oil outlets are arranged 180° apart in the circumferential direction, the two second oil outlets are arranged 180° apart in the circumferential direction, and each of the second oil outlets is arranged 90° apart from the two first oil outlets in the circumferential direction.

[0009] Optionally, the oil inlet groove of one of the balance plates and the oil inlet groove of the other balance plate are respectively connected to different second oil circuits; each of the oil inlet grooves is connected to at least two of the plurality of second oil circuits.

[0010] Optionally, the iron core includes a plurality of core bodies connected in sequence along the axial direction, each of the core bodies is provided with a plurality of oil passage sections spaced apart in the axial direction; the plurality of oil passage sections in the axial direction are connected in sequence to form a corresponding second oil path.

[0011] Optionally, each of the balance plates has multiple oil inlet grooves and multiple oil outlet grooves; the multiple oil inlet grooves are spaced apart in the circumferential direction, the multiple oil outlet grooves are spaced apart in the circumferential direction, and each oil outlet groove is located between two oil inlet grooves in the circumferential direction.

[0012] Optionally, each balance plate has two oil inlet grooves and two oil outlet grooves; the two oil inlet grooves are arranged 180° apart in the circumferential direction, the two oil outlet grooves are arranged 180° apart in the circumferential direction, and each oil outlet groove is arranged 90° apart from the two oil inlet grooves in the circumferential direction.

[0013] Optionally, the balance plate is further provided with an oil injection hole, which extends along the axial direction and is connected to the oil inlet groove; the balance plate includes a main body and an extension part, the extension part protrudes from the main body along the axial direction, and the oil injection hole is arranged in the extension part.

[0014] Optionally, each of the cores is provided with a plurality of mounting slots; the rotor further comprises magnets arranged in the mounting slots, and the plurality of magnets on each of the cores are arranged in a 2.5° slanted pole arrangement.

[0015] According to a second aspect of the present invention, a motor is provided, comprising a stator and the above-mentioned rotor, wherein the stator is located outside the rotor in the radial direction of the rotor to receive oil flowing out of the oil outlet groove of the balancing plate.

[0016] According to a third aspect of the present invention, a vehicle is provided, comprising the above-mentioned motor.

[0017] In summary, the rotor, motor and vehicle provided by the present application have at least the following beneficial effects:

[0018] The rotor includes a rotating shaft, an iron core and two balancing plates; the rotating shaft is provided with a first oil circuit, the iron core is sleeved on the rotating shaft and provided with a plurality of second oil circuits; the two balancing plates are sleeved on the rotating shaft and are respectively located at the two ends of the iron core in the axial direction, and each of the balancing plates is provided with an oil inlet groove and an oil outlet groove; the oil inlet groove of one of the balancing plates is connected to the first oil circuit and is connected to the oil outlet groove of the other balancing plate through the corresponding second oil circuit, and the oil inlet groove of the other balancing plate is connected to the first oil circuit and is connected to the oil outlet groove of one of the balancing plates through the corresponding second oil circuit. Thus, the first oil circuit of the rotating shaft and the second oil circuit of the iron core can be connected through the oil inlet groove of the balancing plate, so that the oil flows from the first oil circuit through the balancing plate and then flows through the second oil circuit to cool the iron core; further, since the balancing plates are arranged at the two ends of the iron core, the second oil circuits respectively connected through the two balancing plates can form opposite oil circuits in the iron core, that is, a bidirectional oil circuit is formed in the iron core, which is beneficial to improve the heat dissipation efficiency of the iron core. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific implementation or the prior art description. Obviously, the drawings described below are some implementations of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 A schematic diagram of the oil circuit of the rotor provided in an embodiment of the present application;

[0021] Figure 2 A schematic diagram of the oil circuit of the rotor provided in an embodiment of the present application;

[0022] Figure 3 A schematic diagram of the structure of the core provided in an embodiment of the present application;

[0023] Figure 4 A schematic diagram of the structure of a balance board provided in an embodiment of the present application;

[0024] Figure 5 A schematic diagram of the structure of a rotor provided in an embodiment of the present application;

[0025] Figure 6 A schematic diagram of the structure of the rotating shaft provided in an embodiment of the present application;

[0026] Figure 7 A schematic diagram of the structure of the rotor provided in the embodiment of the present application; and

[0027] Figure 8 A schematic diagram of the structure of the rotor and stator provided in an embodiment of the present application.

[0028] The reference numerals are as follows:

[0029] 100, rotor; 110, rotating shaft; 111, first oil circuit; 112, first oil outlet; 113, second oil outlet; 120, balance plate; 121, oil inlet groove; 122, oil outlet groove; 123, main body; 124, extension; 125, oil injection hole; 130, iron core; 131, second oil circuit; 132, core body; 133, magnetic steel;

[0030] 200. Stator. DETAILED DESCRIPTION

[0031] In the description of the present application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like appear to indicate the orientation or position relationship, unless otherwise specified, they are understood to be based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application.

[0032] In addition, if there is a feature defined as "first" or "second", it is only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Features defined as "first" or "second" may explicitly or implicitly include at least one of the defined features. If there is a description of "plurality", the general meaning is to include at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0033] In this application, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected", "fixed" and so on should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection, it can be a direct connection, or it can be an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0034] In the description of this specification, if the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" appear, it means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0035] See also Figure 1-Figure 7 As shown, the present application provides a rotor 100, including a rotating shaft 110, an iron core 130 and two balancing plates 120:

[0036] The rotating shaft 110 is provided with a first oil passage 111 , and the iron core 130 is sleeved on the rotating shaft 110 and is provided with a plurality of second oil passages 131 ;

[0037] The two balancing plates 120 are both sleeved on the rotating shaft 110 and are respectively located at two ends of the iron core 130 in the axial direction, and each balancing plate 120 is provided with an oil inlet groove 121 and an oil outlet groove 122;

[0038] The oil inlet groove 121 of one of the balance plates 120 is connected to the first oil circuit 111 and is connected to the oil outlet groove 122 of the other balance plate 120 through the corresponding second oil circuit 131. The oil inlet groove 121 of the other balance plate 120 is connected to the first oil circuit 111 and is connected to the oil outlet groove 122 of one of the balance plates 120 through the corresponding second oil circuit 131.

[0039] Specifically, in the above structure, the balance plate 120 and the iron core 130 are both sleeved on the rotating shaft 110, and the balance plate 120 is located at both ends of the iron core 130 in the axial direction, so that the first oil path 111 of the rotating shaft 110 and the second oil path 131 of the iron core 130 can be connected through the oil inlet groove 121 of the balance plate 120, so that the oil flows from the first oil path 111 through the balance plate 120 and then flows through the second oil path 131 to cool the iron core 130; further, since the balance plate 120 is arranged at both ends of the iron core 130, the second oil paths 131 connected by the two balance plates 120 can form opposite oil paths in the iron core 130, that is, a bidirectional oil path is formed in the iron core 130, which is beneficial to improve the heat dissipation efficiency of the iron core 130. It should be noted that the axial and radial directions involved in this application are all based on the rotating shaft 110 as a reference.

[0040] In some embodiments of the present application, the first oil circuit 111 has a first oil outlet 112 and a second oil outlet 113 extending radially, and the first oil circuit 111 is connected to the oil inlet groove 121 of one of the balance plates 120 through the first oil outlet 112, and is connected to the oil inlet groove 121 of the other balance plate 120 through the second oil outlet 113; the first oil outlet 112 and the second oil outlet 113 are spaced apart in the axial direction and the circumferential direction.

[0041] Specifically, in the above structure, the direction of the first oil circuit 111 can be along the axial direction of the rotating shaft 110, and the first oil circuit 111 is connected to the second oil circuit 131 through the first oil outlet 112 or the second oil outlet 113 radially arranged along the rotating shaft 110; wherein, the first oil outlet 112 and the second oil outlet 113 can be multiple, and the first oil outlet 112 and the second oil outlet 113 are respectively arranged in two radial cross-sections to respectively connect the oil inlet grooves 121 of the two balance plates 120 arranged at both ends; and the first oil outlet 112 and the second oil outlet 113 are both spaced apart in their radial cross-sections, and it is only necessary to ensure that the first oil outlet 112 and the second oil outlet 113 are staggered with each other.

[0042] In some embodiments of the present application, the number of the first oil outlet 112 and the number of the second oil outlet 113 are both multiple; the multiple first oil outlets 112 are spaced apart in the circumferential direction, the multiple second oil outlets 113 are spaced apart in the circumferential direction, and each second oil outlet 113 is located between two first oil outlets 112 in the circumferential direction.

[0043] Specifically, each second oil outlet 113 is located between the two first oil outlets 112 in the circumferential direction. It should be understood that when the first oil outlet 112 and the second oil outlet 113 are projected to the same radial cross-section, each second oil outlet 113 is located between the two first oil outlets 112 in the circumferential direction, thereby forming mutually spaced bidirectional oil paths in the iron core 130, which can further improve the heat dissipation efficiency of the iron core 130.

[0044] Please participate Figure 6 As shown, in some embodiments, the number of the first oil outlets 112 and the number of the second oil outlets 113 are both two; the two first oil outlets 112 are arranged 180° apart in the circumferential direction, the two second oil outlets 113 are arranged 180° apart in the circumferential direction, and each second oil outlet 113 is arranged 90° apart from the two first oil outlets 112 in the circumferential direction.

[0045] In some embodiments of the present application, the oil inlet groove 121 of one balance plate 120 and the oil inlet groove 121 of another balance plate 120 are respectively connected to different second oil passages 131 ; each oil inlet groove 121 is connected to at least two of the plurality of second oil passages 131 .

[0046] Specifically, the oil inlet groove 121 of one balancing plate 120 and the oil inlet groove 121 of another balancing plate 120 are respectively connected to different second oil paths 131, so as to form a bidirectional oil path in the iron core 130; and each oil inlet groove 121 is connected to at least two of the plurality of second oil paths 131, and the oil accumulation characteristics of the oil inlet groove 121 and the oil outlet groove 122 can be utilized, and the oil flow rate in the second oil path 131 can be adjusted by connecting the oil inlet groove 121 and the oil outlet groove 122 through the plurality of second oil paths 131, so as to improve the heat dissipation efficiency of the iron core 130. Please refer to Figure 3 and Figure 4 As shown, in some embodiments, each oil inlet groove 121 may correspond to two second oil passages 131 .

[0047] In some embodiments of the present application, the iron core 130 includes a plurality of core bodies 132 connected in sequence along the axial direction, and each core body 132 is provided with a plurality of oil passage sections spaced apart in the axial direction; the plurality of oil passage sections in the axial direction are connected in sequence to form a corresponding second oil path 131 .

[0048] Specifically, in order to facilitate the installation of magnets in the iron core 130 to form a magnetic field so that the rotor 100 in the motor can work, in the present application, the iron core 130 is designed as a combined structure composed of multiple core bodies 132; at the same time, a plurality of second oil passages 131 formed by a combination of multiple oil passage sections arranged in each core body 132 are used to form a bidirectional oil passage to improve the heat dissipation efficiency of the iron core 130, that is, to improve the heat dissipation efficiency of the magnet and avoid demagnetization due to excessive temperature of the magnet.

[0049] In some embodiments of the present application, each core 132 is provided with a plurality of mounting slots; the rotor 100 further includes magnets disposed in the mounting slots, and the plurality of magnets on each core 132 are arranged in a 2.5° skewed pole arrangement.

[0050] For details, please refer to Figure 3 As shown, a plurality of mounting grooves are provided in the core 132, and the magnets can be installed in the core 132 through the mounting grooves. The plurality of magnets arranged in the core 132 are arranged in a 2.5° oblique pole arrangement, which can provide a magnetic field through the magnetic steel 133 while reducing torque pulsation.

[0051] In some embodiments of the present application, each balance plate 120 has multiple oil inlet grooves 121 and multiple oil outlet grooves 122; the multiple oil inlet grooves 121 are spaced apart in the circumferential direction, the multiple oil outlet grooves 122 are spaced apart in the circumferential direction, and each oil outlet groove 122 is located between two oil inlet grooves 121 in the circumferential direction.

[0052] Specifically, a plurality of oil inlet grooves 121 are arranged at intervals in the circumferential direction, and a plurality of oil outlet grooves 122 are arranged at intervals in the circumferential direction, and each oil outlet groove 122 is located between two oil inlet grooves 121 in the circumferential direction. This not only ensures that the two-way oil passages are arranged at intervals in the circumferential direction to improve the heat dissipation efficiency of the iron core 130, but also when the oil inlet grooves 121 and the oil outlet grooves 122 on the balancing plate 120 are arranged at equal intervals, the versatility of the balancing plate 120 can be improved, that is, there is no need to distinguish the setting method of the oil inlet grooves 121 and the oil outlet grooves 122 on the two balancing plates 120. During installation, it is only necessary to align the oil inlet groove 121 of the balancing plate 120 at one end with the oil outlet groove 122 of the balancing plate 120 at the other end.

[0053] See also Figure 4 As shown, in some embodiments, each balance plate 120 has two oil inlet grooves 121 and two oil outlet grooves 122; the two oil inlet grooves 121 are arranged 180° apart in the circumferential direction, the two oil outlet grooves 122 are arranged 180° apart in the circumferential direction, and each oil outlet groove 122 is arranged 90° apart from the two oil inlet grooves 121 in the circumferential direction.

[0054] In some embodiments of the present application, the balance plate 120 is further provided with an oil injection hole 125, which extends axially and is connected to the oil inlet groove 121; the balance plate 120 includes a main body 123 and an extension portion 124, the extension portion 124 protrudes axially from the main body 123, and the oil injection hole 125 is provided in the extension portion 124.

[0055] For details, please refer to Figure 8 As shown, since the extension portion 124 protrudes from the main body 123, especially the extension portion 124 protrudes from the edge of the main body 123, the oil injection port can protrude from the edge of the main body 123, so that after the oil is thrown out through the oil injection hole 125, it can be directly thrown toward the stator 200 under the action of centrifugal force, thereby preventing the oil from entering the air gap between the rotor 100 and the stator 200 and affecting the normal operation of the motor.

[0056] The present application provides a motor, including a stator 200 and any one of the above-mentioned rotors 100 . The stator 200 is located outside the rotor 100 in the radial direction of the rotor 100 to receive oil flowing out of the oil outlet groove 122 of the balancing plate 120 .

[0057] The present application provides a vehicle, which includes the above-mentioned motor.

[0058] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Those skilled in the art can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A rotor (100), characterized in that: It includes a rotating shaft (110), an iron core (130) and two balancing plates (120): The rotating shaft (110) is provided with a first oil passage (111), and the iron core (130) is sleeved on the rotating shaft (110) and is provided with a plurality of second oil passages (131); The two balancing plates (120) are both sleeved on the rotating shaft (110) and are respectively located at two ends of the iron core (130) in the axial direction, and each balancing plate (120) is provided with an oil inlet groove (121) and an oil outlet groove (122); The oil inlet groove (121) of one of the balancing plates (120) is connected to the first oil passage (111) and is connected to the oil outlet groove (122) of the other balancing plate (120) through the corresponding second oil passage (131); the oil inlet groove (121) of the other balancing plate (120) is connected to the first oil passage (111) and is connected to the oil outlet groove (122) of the one of the balancing plates (120) through the corresponding second oil passage (131).

2. The rotor (100) according to claim 1, characterized in that The first oil passage (111) has a first oil outlet (112) and a second oil outlet (113) extending in a radial direction, the first oil passage (111) being connected to the oil inlet groove (121) of one of the balancing plates (120) through the first oil outlet (112), and being connected to the oil inlet groove (121) of the other balancing plate (120) through the second oil outlet (113); The first oil outlet (112) and the second oil outlet (113) are arranged at intervals in the axial direction and the circumferential direction.

3. The rotor (100) according to claim 2, characterized in that The first oil outlet (112) and the second oil outlet (113) are both multiple in number; A plurality of the first oil outlets (112) are arranged at intervals in the circumferential direction, a plurality of the second oil outlets (113) are arranged at intervals in the circumferential direction, and each of the second oil outlets (113) is located between two of the first oil outlets (112) in the circumferential direction.

4. The rotor (100) according to claim 1, characterized in that The oil inlet groove (121) of one of the balancing plates (120) and the oil inlet groove (121) of the other balancing plate (120) are respectively connected to different second oil passages (131); Each of the oil inlet grooves (121) is in communication with at least two of the plurality of the second oil passages (131).

5. The rotor (100) according to claim 1, characterized in that The iron core (130) comprises a plurality of core bodies (132) connected in sequence along the axial direction, and each of the core bodies (132) is provided with a plurality of oil-passing sections at intervals along the axial direction; The plurality of oil passage sections in the axial direction are connected in sequence to form a corresponding second oil passage (131).

6. The rotor (100) according to claim 1, characterized in that Each of the balancing plates (120) has a plurality of oil inlet grooves (121) and oil outlet grooves (122); The plurality of oil inlet grooves (121) are arranged at intervals in the circumferential direction, the plurality of oil outlet grooves (122) are arranged at intervals in the circumferential direction, and each of the oil outlet grooves (122) is located between two of the oil inlet grooves (121) in the circumferential direction.

7. The rotor (100) according to any one of claims 1 to 6, characterized in that: The balance plate (120) is further provided with an oil injection hole (125), wherein the oil injection hole (125) extends along the axial direction and is connected to the oil inlet groove (121); The balancing plate (120) comprises a main body (123) and an extension (124), wherein the extension (124) protrudes from the main body (123) along the axial direction, and the oil injection hole (125) is arranged in the extension (124).

8. The rotor (100) according to claim 5, characterized in that Each of the core bodies (132) is provided with a plurality of mounting grooves; The rotor (100) further comprises a magnet disposed in the mounting groove, and the plurality of magnets on each core (132) are arranged in a 2.5° skewed pole arrangement.

9. A motor, characterized in that: It comprises a stator (200) and a rotor (100) according to any one of claims 1 to 8, wherein the stator (200) is located on the outer side of the rotor (100) in the radial direction of the rotor (100) to receive oil flowing out of the oil outlet groove (122) of the balancing plate (120).

10. A vehicle, characterized in that: The vehicle comprises the electric machine of claim 9.

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